Key for brake shoes and hangers



S. MIDURA. KEY FOR BRAKE SHOES AND HANGERS.

APPLICATION FILED JAN. 26. I922.

Patented Dec. 5, 1922.

ried by the key,

Patented cc. 5, 1922.

TSTANISLAW MIDURA, OF PERTH AMBQY, NEW JERSEY.

KEY FOR BRAKE snons AND HANGERS.

' Application filed January 26, 1922. Serial No. 531,893.

ments in Keys for Brake Shoes and Hangers,

of which the following is a specification.

The present invention relates to certam new and useful improvements inkeys for securing brake-shoes to the heads of car brakes. V

The primary object of this invention is the provision of a key forbrake-shoes wherein it will be impossible for the key to become looseand consequently displaced from its operative position.

A further object of the invention is the provision of a spring memberrigidly carwhich after the key has been inserted in its position betweenthe brakehead and brake-shoe, the spring will properly function so as toprevent the key from becoming accidentally displaced.

A still further object of this invention is the provision of an improvedhanger; for the brake-head, whereby the same may be supported in aswinging relation with respect 'to the beam of the truck frame.

\Vith the above and other objects in View, the invention consists of thenovel form, combination and arrangement of parts hereinafter more fullydescribed, shown in the accompanying drawing and claimed.

In the drawing, wherein like reference characters designatecorresponding parts throughout the several views,

Figure 1 is a side view partly in section and partly in elevation of ausual form 0 brake-head and shoe, with the key in its proper position,

Figure 2 is a perspective view of my improved key, I

Figure 3 is a similar view of the leaf spring attached to the key, and

Figure 4 is an enlarged detail view, partly in section and partly brokenaway of the brake-head. hanger.

Referring more in detail to the accompanying drawing, 0 indicates anyconventional type of brake-head carrying the usual lugs 6 and 7. Avstandard form of brakeshoe is shown at 8 and likewise carries a lug 9adapted to be received between the lugs 6 and 7 of the brake-head whenthe shoe is positioned for operatively connecting with the brake-head 5.The lugs 6, 7 and 9 have I the usual alined apertures which provide akey-way for the key '10, by means ofwhi'ch the shoe and head are lockedtogether. The shank of the key 10 is suitably tapered so that when thekey is driven to the position in which it is shown in Fig. 1 it willdraw the shoe 8 into firm contact with the face of the head 5.

- The key 10 is provided at apoint spaced upwardly from its lower endwith an inclined slot 11 adapted to receive one end of a substantiallyelongated leaf spring member 12. The spring 12 consists of a singlepiece of spring steel of a width comparatively that of the key 10 and isslightly curved outwardly so that when its lower end is positionedwithin the key slot 11 the upper end of the spring will be spaced aslight distance away from the adjacent face of the key 10. The slot 11is incut from the rear surface 10 of the key 10 and has at its lowerterminus a substantially circular tapered groove 13 adapted to receive acircular tapered head 14 of the key 12. It will be seen that the slot 11and groove 13 are transversely of the key 10 and that when the spring 12is slid transversely within the'slot 11 the tapered head 14 of thespring will be firmly wedged within the groove 13 to securely retain thespring within the slot. As a means for positively retaining the springwithin the slot, rivets or other fastening means 15 may be provided.

From the foregoing description it will be clearly seen that when the key10 is being positioned for use between the head 5 and shoe 8 the spring12 will be forced against f the inner face 10 of the key 10 while thesame is passing through the alined apertures of the lugs 6, 7 and 9carried bythe head and shoe. When the spring12 is completely passedthrough the aperture in the .lower lug 7 of the head 5 the same willspring outwardly so as to impinge against the inner face of the lug 7,consequently preventing the key from being accidentally displaced fromits operative position. To

remove the key from between the head and shoe all that is necessary isto apply a slight pressure to the spring 12 to aline the same with theapertures in the lugs at which time the key may be readily removed.

As a means for supporting the brake-head 5 upon the truck frame beam 16there is provided, as clearly shown in Fig. 41, a

isy'pivotally secure to the forwardly probracket member 17, comprising abase plate '18- and integral forwardly projecting legs 19. Thebrake-head fiisprovided'with the usual'transverse slot adapted torecelve the lower integral cross member 21 of two substantially verticalconnecting arms .22;

The cross member 21 and vertical arms 22 a form in reality asubstantially U-shaped link to the adjacent side face of the beam 16.

While there is herein shown and described the preferred embodiment ofthe present inventlon, it is nevertheless to be understood that minorchanges 'may be made therein without'departing from the spirit and scopeof the invention.

What is claimed as new is 1. In combination with a brake-head andLeeaoee shoe having interengagin lug members with alined apertures whent e same are posiing an inclined slot cut therein, a spring member withits lower end received within said slot, the upper end of which isadapted to impinge against the inner face of. the lower lug of thebrake-head for retaining the key in operative position 2. A key forbrake-heads and shoes having an inclined slot adjacent its lower end,the lower terminus of said slot being in the form of a circular taperedgroove, a leaf spring having a substantially circular tapered head atits lower end, the said tapered head and a portion of said springadapted to be received within the inclined slot. and

tapered circular groove for rigidly main- STANJISLAW MIDURA.

